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Verified answer
F (-2) = -2a + b = -1f (-1) = -a + b = 2
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-a = -3
a = 3
f (-2) = -2a + b = -1
-2(3) + b = -1
-6 + b = -1
b = -1 + 6
b = 5
jadi, nilai a dan b berturut turut adalah 3 dan 5